36results about How to "Improve bead durability" patented technology

A pneumatic tire including a radial carcass (5) of at least one carcass ply including a main body portion (3a) and a turnup portion (3b), and a reinforcing member (7) including at least two reinforcing layers. The at least two reinforcing layers (6a, 6b) are cross reinforcing layers (21) arranged so as to envelop at least the turnup portion of the radial carcass and cross cords of these layers with each other. Outer ends of the cross reinforcing layers, located outward from the turnup portion (3b) of the radial carcass in the widthwise direction of the tire, are outward from an outer end (13) of the turnup portion of the radial carcass in the radial direction of the tire. A crossing angle α between cords of adjacent cross reinforcing layers with respect to a circumferential direction (15) of the tire is more than 50° but less than 130°.

Polymers, hydrogels, and thermochromic agents, including products embodying them, methods of using them, and processes for making them. In certain embodiments, temperature therapy packs which utilize thermochromic agents integrated into solid, semi-solid, or liquid hydrogels. In preferred (but optional) embodiments, the thermochromic agents are integrated into the composition used as the temperature exchange material of the therapy pack. In certain other embodiments, methods of using the thermochromic integrated temperature exchange materials, or processes for manufacturing such thermochromic integrated temperature exchange materials and / or methods or processes for manufacturing or using thermal packs embodying such materials. In certain particularly preferred embodiments, novel polymer compositions and / or processes for making polymers, which improve product durability or longevity and / or which improve use cycles or usage times.

A heavy-load radial tire includes a bead apex rubber 8 composed of a high-elastic lower apex portion 11 and a low-elastic upper apex portion 12. The lower apex portion 11 has an L-shaped cross section composed of a bottom piece portion 11a disposed along the radially outer surface of a bead core 5 and a standing piece portion 11b standing from the axially inner end of the bottom piece portion 11a and radially outwardly extending along a ply main portion 6a of a carcass 6. At an outer end position P1 of a ply turnup portion 6b, the upper apex portion 12 has a thickness T1s of 0.50 to 0.75 times a core width Bw of the bead core 5. At an outer end position P2 of an outer wound-up portion 9o of a bead reinforcing cord layer 9, the upper apex portion 12 has a thickness T2s of 0.57 to 0.90 times the core width Bw. The core width Bw is 0.68 to 0.80 times a bead bottom width BL. A distance W1 oriented in parallel to an outer surface 5S of the bead core 5 and ranging from a bead heal point Ph to an axially innermost end 5e of the bead core 5 is 0.92 to 1.08 times the bead bottom width BL.

A pneumatic tire comprises a carcass formed of a carcass ply extending between a pair of bead portions in a toroidal shape, and a bead core disposed in a respective one of the bead portions, the bead core comprising an axially inner core and an axially outer core respectively disposed on an axially inner side and the axially outer side of the carcass ply. The bead portion comprises an inner bead apex rubber extending radially outward from the inner core, and an outer bead apex rubber extending radially outward from the outer core. An outer apex height Ho from a bead base line to a outer end of the outer bead apex rubber is in a range of from 120% to 150% of an inner apex height Hi from the bead base line to the outer end of the inner bead apex rubber.